Question

A company decides to evaluate the number of years employees stay with the company. The table shows how many years a random sample of 30 former employees worked before quitting. The company will not make any change to its human resources policies if it is conclusively shown that at least 60% of all its employees had worked for at least 10 years. What is the point estimate for the proportion of employees who quit after working at least 10 years with the company?
Employee
Number
Years
Worked
1

8

2

13

3

15

4

3

5

13

6

28

7

4

8

12

9

4

10

26

11

29

12

3

13

10

14

3

15

17

16

13

17

15

18

15

19

23

20

13

21

12

22

1

23

14

24

14

25

17

26

16

27

7

28

27

29

18

30

24

Answer 1

Out of the sampled 30 employees 22 worked for at least 10 years.
point estimate (p^) = 22/30 = 0.73